Horizontal and vertical circulation patterns over the Qinghai-Xizang (Tibet) plateau during summer, derived from meteorological observations, are compared with results from rotating annulus experiments. There are several striking features during the season when the plateau acts as a huge elevated heat source: 1) a heat low dominates the planetary boundary layer over the plateau; 2) this heat low is broken up into several cells, giving rise to shear-line development; 3) surrounding the heat low is an anticyclonic belt; 4) the northern and southern portions of this belt approach each other as one proceeds into the upper troposphere and finally merge into a large anticyclone over the plateau; and 5) significant circulation cells appear in meridional and zonal cross sections, attesting to the strong influence of the plateau on the general circulation of the atmosphere.

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Footnotes

1Prof. Ye Duzheng (Tu-cheng Yeh) studied at the University of Chicago after World War II and received a Ph.D. degree from that university. He is now Director of the Institute of Atmospheric Physics, Academia Sinica; President of the Chinese Meteorological Society; Deputy to the National People's Congress; and Vice-Chairman of the Working Group on Atmospheric Science under the Committee on Science and Technology (the Chairman of that committee is Vice-Premier Feng Yi). In spite of all these official duties Prof. Yeh maintains a very active involvement in many research projects, ranging from numerical and geophysical modeling to objective long-range forecasting. (Comments by E. R. Reiter.)